io_cancel - 取消未完成的異步I / O操作

內容簡介

#include <libaio.h>

標籤

描述

long io_cancel (aio_context_t ctx_id, struct iocb \iocb*, struct io_event \result*);

描述

io_cancel() attempts to cancel an asynchronous I/O operation previously submitted with the io_submit system call. ctx_id is the AIO context ID of the operation to be cancelled. If the AIO context is found, the event will be cancelled and then copied into the memory yiibaied to by result without being placed into the completion queue.

返回值

io_cancel() returns 0 on success; otherwise, it returns one of the errors listed in the "Errors" section.

錯誤

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描述

EINVAL

The AIO context specified by ctx_id is invalid.

EFAULT

One of the data structures yiibais to invalid data.

EAGAIN

The iocb specified was not cancelled.

ENOSYS

io_cancel() is not implemented on this architecture.

版本

The asynchronous I/O system calls first appeared in Linux 2.5, August 2002.

遵循於

io_cancel() is Linux specific and should not be used in programs that are intended to be portable.

另請參閱

io_setup(2), io_destroy(2), io_getevents(2), io_submit(2).

注意

The asynchronous I/O system calls were written by Benjamin LaHaise.

作者

Kent Yoder.